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Add support for FP constants, fixing UnitTests/2004-02-02-NegativeZero

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23038 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2005-08-25 04:47:18 +00:00
parent 6f5f8b380a
commit 2fe76e58eb
1 changed files with 25 additions and 6 deletions
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31
lib/Target/PowerPC/PPCISelDAGToDAG.cpp
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@ -15,6 +15,7 @@
#include "PowerPC.h"
#include "PPC32TargetMachine.h"
#include "PPC32ISelLowering.h"
#include "llvm/CodeGen/MachineConstantPool.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/SSARegMap.h"
@ -22,6 +23,7 @@
#include "llvm/CodeGen/SelectionDAGISel.h"
#include "llvm/Target/TargetOptions.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/Constants.h"
#include "llvm/GlobalValue.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/MathExtras.h"
@ -141,12 +143,15 @@ static bool isRunOfOnes(unsigned Val, unsigned &MB, unsigned &ME) {
// look for the first zero bit after the run of ones
ME = CountLeadingZeros_32((Val - 1) ^ Val);
return true;
} else if (isShiftedMask_32(Val = ~Val)) { // invert mask
// effectively look for the first zero bit
ME = CountLeadingZeros_32(Val) - 1;
// effectively look for the first one bit after the run of zeros
MB = CountLeadingZeros_32((Val - 1) ^ Val) + 1;
return true;
} else {
Val = ~Val; // invert mask
if (isShiftedMask_32(Val)) {
// effectively look for the first zero bit
ME = CountLeadingZeros_32(Val) - 1;
// effectively look for the first one bit after the run of zeros
MB = CountLeadingZeros_32((Val - 1) ^ Val) + 1;
return true;
}
}
// no run present
return false;
@ -525,6 +530,20 @@ SDOperand PPC32DAGToDAGISel::Select(SDOperand Op) {
}
break;
}
case ISD::ConstantFP: { // FIXME: this should get sucked into the legalizer
MachineConstantPool *CP = CurDAG->getMachineFunction().getConstantPool();
Constant *CFP = ConstantFP::get(Type::FloatTy,
cast<ConstantFPSDNode>(N)->getValue());
SDOperand CPN = CurDAG->getConstantPool(CP->getConstantPoolIndex(CFP),
MVT::i32);
SDOperand Tmp;
if (PICEnabled)
Tmp = CurDAG->getTargetNode(PPC::ADDIS, MVT::i32, getGlobalBaseReg(),CPN);
else
Tmp = CurDAG->getTargetNode(PPC::LIS, MVT::i32, CPN);
CurDAG->SelectNodeTo(N, N->getValueType(0), PPC::LFS, CPN, Tmp);
break;
}
case ISD::UNDEF:
if (N->getValueType(0) == MVT::i32)
CurDAG->SelectNodeTo(N, MVT::i32, PPC::IMPLICIT_DEF_GPR);